Interview with more details on FF Resonance

https://automaton-media.com/en/interviews/final-fantasy-resonance-devs-say-ffbe-was-too-good-to-become-unplayable-so-its-been-reborn-with-a-reworked-story-world-map-and-enough-changes-to-feel-like-a-new-game/

It talks about development started before FFBE EoS, based on season 1 of FFBE, rebuilt the game, etc